/* roulang page: index */
:root {
            --primary-deep-purple: #2D1B4E;
            --primary-burgundy: #4A0E2E;
            --accent-gold: #D4AF37;
            --accent-leaf-green: #2E5C3B;
            --accent-sage: #9CAF88;
            --bg-warm-white: #FDFBF7;
            --bg-light-green: #F4F6F4;
            --text-dark: #1a1a1a;
            --text-soft: #4a4a4a;
            --text-light-on-dark: #e0e0e0;
            --border-subtle: #e0dcd5;
            --shadow-card: 0 8px 30px rgba(0,0,0,0.05);
            --shadow-card-hover: 0 16px 40px rgba(0,0,0,0.08);
            --radius-card: 16px;
            --radius-button: 8px;
            --transition-smooth: all 0.3s ease;
            --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --section-padding: 5rem 1.5rem;
            --header-height: 80px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-system);
            background-color: var(--bg-warm-white);
            color: var(--text-dark);
            line-height: 1.7;
            font-size: 1.0625rem;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-smooth);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* 导航样式 */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 2px 12px rgba(0,0,0,0.03);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--primary-deep-purple);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .logo i {
            color: var(--accent-gold);
            font-size: 2rem;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2.2rem;
            align-items: center;
        }

        .nav-links a {
            font-weight: 500;
            color: var(--text-dark);
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition-smooth);
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary-burgundy);
            border-bottom-color: var(--accent-gold);
        }

        /* Mega Menu 触发器 */
        .mega-trigger {
            position: relative;
            cursor: pointer;
        }
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(10px);
            background: #ffffff;
            border-radius: var(--radius-card);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            padding: 1.8rem;
            display: flex;
            gap: 1.8rem;
            width: 580px;
            opacity: 0;
            visibility: hidden;
            transition: all 0.25s ease;
            pointer-events: none;
            border: 1px solid rgba(0,0,0,0.04);
        }
        .mega-trigger:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(8px);
            pointer-events: auto;
        }
        .mega-card {
            flex: 1;
            background: var(--bg-light-green);
            border-radius: 12px;
            padding: 1.2rem;
            text-align: center;
            transition: var(--transition-smooth);
        }
        .mega-card:hover {
            background: white;
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }
        .mega-card i {
            font-size: 1.8rem;
            color: var(--primary-deep-purple);
            margin-bottom: 0.5rem;
        }
        .mega-card h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.3rem;
        }
        .mega-card p {
            font-size: 0.8rem;
            color: var(--text-soft);
            line-height: 1.4;
        }

        /* Hero 区块 */
        .hero {
            padding: calc(var(--header-height) + 3rem) 1.5rem 4rem;
            display: flex;
            align-items: center;
            min-height: 85vh;
            background: var(--bg-warm-white);
            position: relative;
            overflow: hidden;
        }
        .hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
            gap: 2.5rem;
        }
        .hero-text {
            flex: 1 1 450px;
            z-index: 2;
        }
        .hero-text h1 {
            font-size: 3.8rem;
            font-weight: 700;
            line-height: 1.2;
            color: var(--primary-deep-purple);
            margin-bottom: 1.5rem;
        }
        .hero-text .subtitle {
            font-size: 1.3rem;
            color: var(--text-soft);
            margin-bottom: 2.2rem;
        }
        .btn-primary {
            background: var(--primary-burgundy);
            color: white;
            padding: 0.9rem 2.4rem;
            border-radius: var(--radius-button);
            font-weight: 600;
            display: inline-block;
            border: none;
            transition: var(--transition-smooth);
            box-shadow: 0 6px 18px rgba(74,14,46,0.15);
            font-size: 1.1rem;
        }
        .btn-primary:hover {
            background: #3b0b23;
            box-shadow: 0 10px 22px rgba(74,14,46,0.25);
            transform: translateY(-2px);
            color: white;
        }
        .hero-visual {
            flex: 1 1 450px;
            position: relative;
            min-height: 380px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-radius: 32px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            overflow: hidden;
        }
        .hero-visual::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(45,27,78,0.25) 0%, rgba(74,14,46,0.3) 100%);
            border-radius: 32px;
        }
        .overlay-pattern {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 2;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200" opacity="0.2"><path d="M70 40 Q90 10 110 40 T150 40" stroke="%23D4AF37" fill="none" stroke-width="1.5"/><circle cx="130" cy="90" r="4" fill="%23D4AF37"/><path d="M40 120 Q60 90 80 120 T120 120" stroke="%23D4AF37" fill="none"/></svg>');
            background-size: 180px;
            mix-blend-mode: overlay;
        }

        /* 通用区块样式 */
        .section {
            padding: var(--section-padding);
        }
        .section h2 {
            font-size: 2.6rem;
            font-weight: 600;
            margin-bottom: 2.5rem;
            color: var(--primary-deep-purple);
        }
        .section-intro {
            max-width: 700px;
            margin-bottom: 3rem;
        }

        /* 痛点区块 */
        .pain-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin-top: 2rem;
        }
        .pain-item {
            flex: 1 1 250px;
            background: white;
            padding: 2rem;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border-left: 6px solid var(--accent-gold);
            transition: var(--transition-smooth);
        }
        .pain-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }
        .pain-item i {
            font-size: 2rem;
            color: var(--primary-burgundy);
            margin-bottom: 1rem;
        }

        /* 解决方案非对称卡片 */
        .solution-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 1.8rem;
            margin-top: 2rem;
        }
        .solution-card {
            background: white;
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            border-top: 5px solid var(--accent-leaf-green);
        }
        .solution-card.featured {
            grid-row: span 2;
            background: var(--bg-light-green);
            border-top: 6px solid var(--accent-gold);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card-hover);
        }
        .solution-card i {
            font-size: 2.2rem;
            color: var(--primary-deep-purple);
        }

        /* 数据区块 */
        .stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            justify-content: space-between;
            margin-top: 1.5rem;
        }
        .stat-item {
            flex: 1 1 180px;
            text-align: center;
            background: white;
            padding: 2rem;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--accent-gold);
        }

        /* 证言卡片 */
        .testimonial-scroll {
            display: flex;
            gap: 1.8rem;
            overflow-x: auto;
            padding-bottom: 1rem;
            scroll-snap-type: x mandatory;
        }
        .testimonial-card {
            min-width: 300px;
            background: #f9f7f2;
            padding: 2rem;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .testimonial-card i.fa-quote-right {
            position: absolute;
            bottom: 15px;
            right: 20px;
            font-size: 2.5rem;
            color: rgba(212,175,55,0.2);
        }

        /* FAQ 手风琴 */
        .accordion-item {
            border-bottom: 1px solid var(--border-subtle);
        }
        .accordion-title {
            font-size: 1.2rem;
            font-weight: 600;
            padding: 1.2rem 0;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease;
        }

        /* 最终 CTA */
        .final-cta {
            background: var(--primary-deep-purple);
            color: white;
            text-align: center;
            border-radius: 32px;
            margin: 2rem auto;
            padding: 3.5rem;
        }
        .btn-gold {
            background: var(--accent-gold);
            color: var(--primary-deep-purple);
            font-weight: 700;
            padding: 1rem 2.5rem;
            border-radius: 50px;
        }

        /* 页脚 */
        .footer {
            background: #1f1236;
            color: #ccc;
            padding: 3rem 1.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 700;
            color: white;
        }

        @media (max-width: 1024px) {
            .hero-text h1 { font-size: 2.8rem; }
            .solution-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { gap: 1rem; }
            .hero { flex-direction: column; }
            .solution-grid { grid-template-columns: 1fr; }
            .mega-panel { width: 90vw; left: 0; transform: translateX(0); }
        }